/*重置样式*/
*{
	margin: 0;
	padding: 0;
	/*把标准盒模型转成怪异盒模型*/
	box-sizing: border-box;
}
html, body, ul, li, ol, dl, dd, dt, p, h1, h2, h3, h4, h5, h6, form, fieldset, legend, img, div, header, nav, section{
	list-style: none;
}
img{
	border: none;
	vertical-align: top;
}
a{
	text-decoration: none;
	color: black;
}
.input-reset{
	border: none;
	outline: none;
}
.ele-middle{
	display: flex;
	justify-content: center;
	align-items: center;
}
.clear-float::after{
	content: "";
	display: block;
	clear: both;
	visibility: hidden;
	height: 0;
}
.clear-float{
	zoom: 1;
}
/*让屏幕宽度和高度100%*/
html, body{
	width: 100%;
	height: 100%;
}